How do I reverse audio in Logic Pro X?

I am a new Logic user. I am having trouble reversing audio. I have the advanced tools enabled as well as the audio check box checked in the additional options. When I open the audio editor for the region that I want to reverse there is no functions button, only edit and view. I have also tried Shift-Control-R and the screen only flashes at me with no change to the region. Any help would be greatly appreciated.

Thanks,

Nick